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<title>Using Python with renv</title>

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<h1 class="title toc-ignore">Using Python with renv</h1>



<p>If you’re using <code>renv</code> with an R project that also depends on some Python packages (say, through the <a href="https://rstudio.github.io/reticulate/">reticulate</a> package), then you may find <code>renv</code>’s Python integration useful.</p>
<div id="activating-python-integration" class="section level2">
<h2>Activating Python Integration</h2>
<p>Python integration can be activated on a project-by-project basis. Use <code>renv::use_python()</code> to tell <code>renv</code> to create and use a project-local Python environment with your project. If the <code>reticulate</code> package is installed and active, then <code>renv</code> will use the same version of Python that <code>reticulate</code> normally would when generating the virtual environment. Alternatively, you can set the <code>RETICULATE_PYTHON</code> environment variable to instruct <code>renv</code> to use a different version of Python.</p>
<p>If you’d rather tell <code>renv</code> to use an existing Python virtual environment, you can do so by passing the path of that virtual environment instead – use <code>renv::use_python(python = &quot;/path/to/python&quot;)</code> and <code>renv</code> will record and use that Python interpreter with your project. This can also be used with pre-existing virtual environments and Conda environments.</p>
</div>
<div id="understanding-python-integration" class="section level2">
<h2>Understanding Python Integration</h2>
<p>Once Python integration is active, <code>renv</code> will attempt to manage the state of your Python virtual environment when <code>snapshot()</code> / <code>restore()</code> is called. With this, projects that use <code>renv</code> and Python can ensure that Python dependencies are tracked in addition to R package dependencies. Note that future restores will require both <code>renv.lock</code> (for R package dependencies) and <code>requirements.txt</code> (for Python package dependencies).</p>
<div id="virtual-environments" class="section level3">
<h3>Virtual Environments</h3>
<p>When using virtual environments, the following extensions are provided:</p>
<ul>
<li><p><code>renv::snapshot()</code> calls <code>pip freeze &gt; requirements.txt</code> to save the set of installed Python packages;</p></li>
<li><p><code>renv::restore()</code> calls <code>pip install -r requirements.txt</code> to install the previously-recorded set of Python packages.</p></li>
</ul>
</div>
<div id="conda-environments" class="section level3">
<h3>Conda Environments</h3>
<p>When using Conda environments, the following extensions are provided:</p>
<ul>
<li><p><code>renv::snapshot()</code> calls <code>conda env export &gt; environment.yml</code> to save the set of installed Python packages;</p></li>
<li><p><code>renv::restore()</code> calls <code>conda env [create/update] --file environment.yml</code> to install the previously-recorded set of Python packages.</p></li>
</ul>
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